Improvement in chimney-tops



, l 1 G. ELBREG- l Chimney Top.

No. 37,683. Patented Feb.17,1863. l i

N 1,/ 'r m A g" g5 A UNITED STATES PATENT OFFICE.

GEORGE ELBREG, OF CINCINNATI, OHIO.

IMPROVEMENT IN CHlMNEY-TOPS.

Specification forming part of Letters Patent No. 37,683, dated February 17, 1863.

To all whom, it may concern:

Be itknown that I, GEORGE ELBREG, of Cin cinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Chimney-Top; and I do hereby declare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is an external view or an elevation of my invention; Fig. 2, a vertical section of the same, taken in the line Lr x, Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the chimney-top, which may be constructed of terra-cotta or any suitable cement or composition, or of cast-metal, or metal and masonry combined. This top is provided with a series of plates, a', which project obliquely inward to nearly the center ofthe interior of the top, and these plates are slightly curved in an upward direction, so as to form concave upper surfaces, as shown clearly in Fig. 2. In the sides of the top A, directly above each pla-te a, there is made an in* clined opening, b, the inclination of the openings corresponding with the inclination of the plates. The plates a at their inner ends .project past each other-that is to say, if

a vertical line be drawn through the center of the top, the ends of the plates a willproject past that line. This is shown clearly in Fig. 2, y y representing the vertical line. By this arrangement it will be seen that the chimney will be protected from rain and also from downward currents of air or backdrafts,7 as the descending rain and wind will be caught by the plates a and made to pass out through the openings b, while the upward draft is not at all checked or interfered with. In the lower parts of the openings b there are tted swinging plates or doors A. These plates may be constructed of sheet metal and suspended at their upper ends in the openings b on journals a. These plates or doors close the lower parts of the openings b by their own gravity, and they are allowed to swing freely outward to admit of the water or rain and wind passing out from the chimney. The plates or doors lare not allowed to swing inward, and consequently cold currentsof air are prevented from entering the chimney laterally, which, if allowed, would have a tendency to check the draft. When there is a downward current or back draft in the top A, as indicated by the blue arrows, the direct or upward draft passes out through the openings 1), as indicated by the black arrows. Thus it will be. seen that the direct or upward draft from the fire is not interfered with or checked on account of descending or back drafts, nor can the flue be cooled or reduced in temperature by rain. An even draft is therefore insured in all cases.

I would remark that any number of plates a and openings b may be used, and those at one side of the top are placed opposite the cen'- ters ofthe spaces, between those at the opposite side, the plates and openings being at two opposite sides of the chimney. I would further remark that the interior of the top may be of sinuous or winding form, as shown in Fig. 2, in order to admit of a free passage of the draft upward. Plane surfaces and angles would in a measure retard the ascending draft through the top A.

Having thus described my invention, what I claim as my invention, and desire to secure by Letters Patent, is

The combination of the self-acting doors Al with the openings b and plates a in the manner and for the purpose herein shown and described.

GEO. ELBREG.

Witnesses:

F. W. ELBREG,

WILLIAM WEIR'. 

